What have you tried? First thing that comes to mind is to replace $fname with 'C:\perl_tests\test.txt'. Let's see what happens:
C:\Users\repellent>type C:\perl_tests\test.txt
abc
cde
efg
C:\Users\repellent>type t.pl
#opening a file, checking the error code.
$fname='C:\perl_tests\test.txt';
open xyz, $fname or die "Error in open:$!";
while(<xyz>){
print "line number $. is : $_";
}
C:\Users\repellent>perl t.pl
line number 1 is : abc
line number 2 is : cde
line number 3 is : efg
Hey, it just works!
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